Obsidian Fireheart [Zendikar] Wurm Set: Khans of Tarkir Prerelease

Set: Khans of Tarkir Prerelease Promos Type: Instant Rarity: Rare Cost: {R}{W} The next time a source of your choice would deal damage to you this turn

it produces colorless mana instead of white mana

He never made *that* mistake again

sacrifice Spark Elemental

Obsidian Fireheart [Zendikar] Wurm Set: Khans of Tarkir PrereleaseSet: Zendikar Type: Creature Elemental Rarity: Mythic Cost: {1}{R}{R}{R} {1}{R}{R}: Put a blaze counter on target land without a blaze counter on it. For as long as that land has a blaze counter on it, it has "At the beginning of your upkeep, this land deals 1 damage to you." (The land continues to burn after Obsidian Fireheart has left the battlefield.)